国风新材：光敏聚酰亚胺（PSPI）光刻胶产品目前处于研发阶段，未进行生产

Group 1 - The company is currently in the research and development stage for its positive photoresist (specifically LCD photoresist) products and has not yet entered production [2] - The development of the photo-sensitive polyimide (PSPI) photoresist products will be advanced based on R&D progress and market conditions, indicating that the timeline for commercialization remains uncertain [2]